Diaphragm valve type 514 PP-H

  Datasheet (PDF)

The Georg Fischer PROGEF Standard Type 514 diaphragm valve is an industrial flow control solution engineered from beta-PP-H (isotactic polypropylene homopolymer) for demanding chemical processing, water treatment, and industrial utilities. Equipped with metric SDR11 butt fusion spigots compatible with heated tool butt welding and infrared (IR) fusion, this manual valve provides high mechanical strength and thermal resistance. As an authorised Georg Fischer distributor, BigWeld supplies the Type 514 valve across Europe for piping networks requiring chemical resistance against acids, alkalis, salts, and demineralised water.

At the core of the PROGEF Type 514 design is an optimised internal flow geometry that doubles the flow coefficient (Kv value) compared to traditional designs. This body profile minimizes turbulence and localized pressure loss, making the valve effective for both clean process fluids and media carrying suspended solids or slurries. The valve combines a true double union construction with a central union nut mechanism that replaces conventional metal body bolts. This central nut distributes clamping force evenly around the diaphragm perimeter, ensuring uniform sealing compression and allowing rapid in-line inspection and diaphragm servicing without cutting or unbolting the welded pipeline.

The upper assembly features a glass-fibre reinforced polypropylene (PP-GF) bonnet equipped with an ergonomic, lockable handwheel and an integrated two-colour optical position indicator. Operating at a nominal pressure rating of 10 bar (PN10 at 20 degrees C), the Type 514 delivers linear throttling characteristics alongside bubble-tight shut-off. Available with diaphragm options in EPDM, FKM, NBR, and dual-layer PTFE/EPDM, this valve ensures reliable service life of up to 25 years in challenging industrial installations.